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package jogamp.opengl.util.pngj.chunks;
import jogamp.opengl.util.pngj.ImageInfo;
import jogamp.opengl.util.pngj.PngHelperInternal;
import jogamp.opengl.util.pngj.PngjException;
/**
* iCCP chunk.
* <p>
* see http://www.w3.org/TR/PNG/#11iCCP
*/
public class PngChunkICCP extends PngChunkSingle {
public final static String ID = ChunkHelper.iCCP;
// http://www.w3.org/TR/PNG/#11iCCP
private String profileName;
private byte[] compressedProfile; // copmression/decopmresion is done in getter/setter
public PngChunkICCP(final ImageInfo info) {
super(ID, info);
}
@Override
public ChunkOrderingConstraint getOrderingConstraint() {
return ChunkOrderingConstraint.BEFORE_PLTE_AND_IDAT;
}
@Override
public ChunkRaw createRawChunk() {
final ChunkRaw c = createEmptyChunk(profileName.length() + compressedProfile.length + 2, true);
System.arraycopy(ChunkHelper.toBytes(profileName), 0, c.data, 0, profileName.length());
c.data[profileName.length()] = 0;
c.data[profileName.length() + 1] = 0;
System.arraycopy(compressedProfile, 0, c.data, profileName.length() + 2, compressedProfile.length);
return c;
}
@Override
public void parseFromRaw(final ChunkRaw chunk) {
final int pos0 = ChunkHelper.posNullByte(chunk.data);
profileName = new String(chunk.data, 0, pos0, PngHelperInternal.charsetLatin1);
final int comp = (chunk.data[pos0 + 1] & 0xff);
if (comp != 0)
throw new PngjException("bad compression for ChunkTypeICCP");
final int compdatasize = chunk.data.length - (pos0 + 2);
compressedProfile = new byte[compdatasize];
System.arraycopy(chunk.data, pos0 + 2, compressedProfile, 0, compdatasize);
}
@Override
public void cloneDataFromRead(final PngChunk other) {
final PngChunkICCP otherx = (PngChunkICCP) other;
profileName = otherx.profileName;
compressedProfile = new byte[otherx.compressedProfile.length];
System.arraycopy(otherx.compressedProfile, 0, compressedProfile, 0, otherx.compressedProfile.length); // deep
// copy
}
/**
* The profile should be uncompressed bytes
*/
public void setProfileNameAndContent(final String name, final byte[] profile) {
profileName = name;
compressedProfile = ChunkHelper.compressBytes(profile, true);
}
public void setProfileNameAndContent(final String name, final String profile) {
setProfileNameAndContent(name, profile.getBytes(PngHelperInternal.charsetLatin1));
}
public String getProfileName() {
return profileName;
}
/**
* uncompressed
**/
public byte[] getProfile() {
return ChunkHelper.compressBytes(compressedProfile, false);
}
public String getProfileAsString() {
return new String(getProfile(), PngHelperInternal.charsetLatin1);
}
}
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